Collapsible tire-core



E CORE.

CATION FILED JULY 9,192].

2 SHEE'E'SSHEET I.

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H. A. DENMIRE. COLLAPSI'BLE TIRE? CORE; APPUCATIION FILED JULY 9,192'1.

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HAROLD A. DENMIfRE, OF ELKRON, OHZO, ASSIGJHOR TO THE GENERAL TIRE & RUBBER FFICE.

COMIANY, 0F .AKRGN, OHIO, A CORPORATION OF OHIO.

COLLAKSIBLE TIRE-CORE.

' To all whom it may concern:

'tatably supported when the tire casings are being formed thereon. In such structures thecore 13 made up of a plurality, preterably two, pairs of arc-shaped sections sup-.

ported on guides upon which they be moved to the expanded position in which they are circumferentially alined and form an annular tire core, and, from the expanded to a collapsed position such that the finished tire may be rem'ov'ed, and. vicev versa.

The present invention relates to the means for supporting and moving said core sections and for causing at least one pair of core sections, as they are moved toward the axis of the supporting shaft, to move out of the way cf the other core sections so that they may also be moved toward the axis of the shaft, and, as they are moved away from said shaft, to move into circumferential alinement with the other core sections.

The invention consists in the construction and combination of parts shown in the drawings as hereinafter described and pointed out definitely in the appended claims. i In the drawings, Figure 1 is a front ele vation of a collapsible tire structure embodying the present invention when the core sections are in their expanded positions; F i 2 is a front elevation partly in section shdwing the position which one pair of core sections take when they are in their collaps d position. Fig. 3 is a side View of the strugture, and Fig. 4 is a top View of the st ture when the core sections are expanded.

,he mechanism includes a shaft 10 to which are secured a plurality of pairs of.

radial guide bars,the two guide bars of each pair being extended in diametrically opposed directions. The guide bars 14-,lgt,

Specification of Letters'i'atent. Patented Deg, 13, 1921,

Application filed July 9, 1921. Serial No. 483,499. I

pairs of guide bars and awayfrom the axis of the supporting shaft 10. Each of these arms is connected at its outer end 'to the middle part of one of four arcshaped sections. The pair of sections which are connected with the arms 20" are represented by 30, and thosewhich are connected with the arms 21 are represented by 31.

In the surface of each of the guide bars 14- a long spiral groove 14* is formed, which groove extends about of the distance around said guide bars.

Each of the collars 20 is provided with an inwardly extended pin 22 which projects into the associated groove 14. If the two collars 20 are moved upon their guide bars let toward the axis of the shaft they will simultaneously be turned about the axis of the guide bar by the action of the inclined grooves upon the pins 22, and thereby the core sections attached to these collars will be swungout of the plane in which.they lie when in their expanded position.

As these core sections are moved along the guide bars toward the axis of the shaft 10 they will be withdrawn from the tire casing which has been formed uponthe expanded core. It makes it easier to move said core sections in and cause them to turn as stated, if before that inward movement is begun, the inner edges of the tire casing be spread apartlaterally as indicated in Fig. 2. Vi hen these core sections 30 have reached the limit of their inward movement they will have been swung so far out of the plane in which theother core sections 31 lie thatsaid other core sections ma then be moved toward the axis-of the s aft a distance sulficient to substantially withdraw them from the tire casing.

, The guide bars 15 as shown do not have the spiral grooves, nor do the collars thereon tween the guide cars 15 and the collars thereon could he provided; but ii. the spire]. grooves in the guide bars 20 are extended eround said guide hers suliiciently they Will. cause such 2. turning of the core sections that said core sections will not interfere with straight redial inward movement of the other core sections 31,

Any suitable means may be employed for moving these collars and core sections outward and inward. The Hie-311$ shown for this purpose include tvvo hand Wheels l0 which are rotatably mounted upon the shaft on opposite sides ot the core supporting collars 11%, 13. These wheels are of the fist dish form, and in each of them are two cum.

uzipcd grooves ll. Pins 23 carrying rollers gr: I

2+: are respectively secured to the two collars 20 and these project. respectively into the two on grooves a l on the adjacent hand wheel to. Similar studs 23" carrying rollers 2i rc 1i.;ed to the collars ill and these project ly into the coin grooves in the hen the core sections are in, the creposition, the right hand wheel he the core sections 30 will he moved ll toward the axis of iit, and will be turned about the axis guide bars by the action of the spiral il hen these core sections have been so noved to the collupsed position the other wheel vvill he turned, and thereby,

ugh the described mechanism, the ther core actions will he moved toward the unis i the shaft to their collapsed positron.

When the core sections are in the coiluiised position the tire casing may he removed.

it will be understood of course that the meeting ends ot' the core sections must he so shaped that the core sections 3U can he moved. inward from their position between the core sections 31, and so that, after the core sections 31 have been moved out to their expanded positio'i'is, the core sections 30 may Jso he moved out and turned into the posiin which they are circiunterentielly with the core sections 31.

i ,1 described in invention, 1' claim collepsihlc re core, the combineshsl-u, a. pair disi'netrically opposed radial guide hers each having {in inclined groove, u pair of arc-shaped core sections which are sl dsbly supported on said guide burs respect catch of said core sections hiivin u pin Wi ch projects into the groove in the guide be: in which it is sup nsesoee 2. in collapsible tire core, the combinetion of ii shalt, ii pair of diametrically opposed radial guide bars each having on in clined groove, 2i pair of zirc-shaped core sections which are slidahly supported on said guide burs respectively, each of said core sections having a pin which projects into the groove in the guide our in which it is sup ported, and n'icans for moving both of said core sections along said guide hers toward and away from the supporting shaft.

3. in e collapsible tire core, the combine-- tion of ii shutt, u pair oi. diametrically opposed radial guide hairs each having an in cliilcd groove, o, psir of zirc-shsped core scctioiis which are slidahly supported on said guide burs respectively, each of porlcd upon such of said guide lMIS, which rolc sections are so constructed that when they are circumfercntially elined they will. form un cumulus, means for simultaneously moving inward or outward the pair of core sections which are supported on the first named radial guide liars, projections secured to said core sections extending into the inclined groove on said guide 'lHllS, and other means for moving inward or outward the other two core sections.

5. in a collapsible tire core, the combine tion of two pairs of arc-shaped core sections adapted when circum'lerentiaill dined to form an annulus, ruduil supports upon which.

said core sections are slidshly supported, a pair of Wheels rotstehly mounted upon said shaft each" having two cam shaped grooves, pins curried by two diunictricully opposed core sections "which respectively project into cam grooves in one cam Wheel, and pins secured respectively to the other two core sections, Which pins project respectively into the "we cairn grooves oi the other wheel.

in testimon whereof, ll hereunto slits: my

signature.

.rlAllOi I) A. 

